/**
 * Showable is a structure that indicates that an instance can be converted to a
 * string.
 *
 * @module Showable
 * @since 2.0.0
 */
import "./_dnt.polyfills.js";
import type { Hold } from "./kind.js";
/**
 * A Showable structure has the method show.
 *
 * @since 2.0.0
 */
export interface Showable<U> extends Hold<U> {
    readonly show: (value: U) => string;
}
/**
 * @since 2.10.0
 */
export declare function struct<A>(shows: {
    [K in keyof A]: Showable<A[K]>;
}): Showable<{
    readonly [K in keyof A]: A[K];
}>;
/**
 * @since 2.10.0
 */
export declare const tuple: <A extends readonly unknown[]>(...shows: { [K in keyof A]: Showable<A[K]>; }) => Showable<Readonly<A>>;